openstack-packstack package adds the following to /etc/httpd/conf.d/ssl.conf and httpd start fails on syntax error, the problematic line is: SSLSessionCache shmcb:/run/httpd/sslcache(512000) Additional Information: # ls /run/httpd/ htcacheclean From journalctl's output: httpd[15696]: AH00526: Syntax error on line 23 of /etc/httpd/conf.d/ssl.conf: httpd[15696]: SSLSessionCache: 'shmcb' session cache not supported (known names: ). Maybe you need to load the appropriate socache module (mod_socache_shmcb?). systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE httpd[15697]: AH00526: Syntax error on line 23 of /etc/httpd/conf.d/ssl.conf: httpd[15697]: SSLSessionCache: 'shmcb' session cache not supported (known names: ). Maybe you need to load the appropriate socache module (mod_socache_shmcb?). httpd.service: control process exited, code=exited status=1 Failed to start The Apache HTTP Server.
Is mod_socache_shmcb module loaded? Check that in /etc/httpd/conf.modules.d/00-base.conf?
Sorry, I don't have that env anymore. Anyone, if you've encountered the same error, could you please provide the requested information?
I'm pretty sure personally that it was because of missing module in config file. I will close this bug for now and if you will be able to reproduce this problem, feel free to reopen this bug.